基于蒙特卡罗法的三源锥束x线ct散射和辐射剂量的分析

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1、ABSTRACTWedevelopedaCTsimulationsystemSimProjbasedontheMonteCarloopen-sourcesoftwareEGSnrc,whichcanbeeasilyusedfordesigningCTsystemgeometryondemand.Westudiedtherelationshipbetweencone-angleoftheX-raybeamandthemagnitudeofscatteredradiation,andanalyzedscatteringandits

2、consequenceinthereconstructedimages.Ithasbeenfoundthat,intheresearchofdose,thetriple-sourceCThasthesamelevelwiththeordinarysingle-sourceCTscanner,thoughthreeimagingsubsystemsareworkingatthesametime.Theresultsofourworkarehelpfulforthedevelopmentofthetriple-sourceCTan

3、dalsolaidthefoundationforfuturesimulationresearch.Keywords:MonteCarlo,triple-sourceCT,scatteredradiation,radiationdose第IV页万方数据目录目录摘要......................................................................................................................................

4、...............................IABSTRACT.........................................................................................................................................................III第一章绪论.................................................................

5、..........................................................................................91.1课题背景......................................................................................................................................................91.1.1CT的发展趋势.....

6、............................................................................................................................91.1.2多源CT的特点..............................................................................................................................101

7、.1.3散射和剂量...................................................................................................................................121.1.4蒙特卡罗仿真法................................................................................................................

8、...........141.2课题概述......................................................................................................................